projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5ae3e846 UD |
1 | /* SPARC v9 __mpn_submul_1 -- Multiply a limb vector with a single limb and |
| 2 | subtract the product from a second limb vector. | |
| 6b628d36 | 3 | |
| 568035b7 | 4 | Copyright (C) 1996-2013 Free Software Foundation, Inc. |
| 6b628d36 | 5 | |
| 5ae3e846 | 6 | This file is part of the GNU MP Library. |
| 6b628d36 | 7 | |
| 5ae3e846 | 8 | The GNU MP Library is free software; you can redistribute it and/or modify |
| 6d84f89a AJ |
9 | it under the terms of the GNU Lesser General Public License as published by |
| 10 | the Free Software Foundation; either version 2.1 of the License, or (at your | |
| 5ae3e846 | 11 | option) any later version. |
| 6b628d36 | 12 | |
| 5ae3e846 UD |
13 | The GNU MP Library is distributed in the hope that it will be useful, but |
| 14 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 6d84f89a | 15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 5ae3e846 | 16 | License for more details. |
| 6b628d36 | 17 | |
| 6d84f89a | 18 | You should have received a copy of the GNU Lesser General Public License |
| 59ba27a6 PE |
19 | along with the GNU MP Library; see the file COPYING.LIB. If not, |
| 20 | see <http://www.gnu.org/licenses/>. */ | |
| 6b628d36 | 21 | |
| 5ae3e846 | 22 | #include <sysdep.h> |
| 6b628d36 | 23 | |
| 6b628d36 | 24 | |
| 5ae3e846 UD |
25 | /* INPUT PARAMETERS |
| 26 | res_ptr o0 | |
| 27 | s1_ptr o1 | |
| 28 | size o2 | |
| 29 | s2_limb o3 */ | |
| 30 | ||
| 31 | ENTRY(__mpn_submul_1) | |
| 9c4c0024 | 32 | save %sp,-192,%sp |
| 5ae3e846 | 33 | |
| 6b628d36 | 34 | sub %g0,%i2,%o7 |
| 6b628d36 | 35 | mov 0,%o0 ! zero cy_limb |
| 2e65ca2b UD |
36 | sllx %o7,3,%o7 |
| 37 | sethi %hi(0x80000000),%o2 | |
| 6b628d36 | 38 | srl %i3,0,%o1 ! extract low 32 bits of s2_limb |
| 2e65ca2b | 39 | sub %i1,%o7,%o3 |
| 6b628d36 | 40 | srlx %i3,32,%i3 ! extract high 32 bits of s2_limb |
| 2e65ca2b UD |
41 | sub %i0,%o7,%o4 |
| 42 | add %o2,%o2,%o2 ! o2 = 0x100000000 | |
| 6b628d36 RM |
43 | |
| 44 | ! hi ! | |
| 45 | ! mid-1 ! | |
| 46 | ! mid-2 ! | |
| 47 | ! lo ! | |
| 2e65ca2b UD |
48 | 1: |
| 49 | ldx [%o3+%o7],%g5 | |
| 6b628d36 | 50 | srl %g5,0,%i0 ! zero hi bits |
| 2e65ca2b | 51 | ldx [%o4+%o7],%l1 |
| 6b628d36 RM |
52 | srlx %g5,32,%g5 |
| 53 | mulx %o1,%i0,%i4 ! lo product | |
| 54 | mulx %i3,%i0,%i1 ! mid-1 product | |
| 55 | mulx %o1,%g5,%l2 ! mid-2 product | |
| 56 | mulx %i3,%g5,%i5 ! hi product | |
| 57 | srlx %i4,32,%i0 ! extract high 32 bits of lo product... | |
| 58 | add %i1,%i0,%i1 ! ...and add it to the mid-1 product | |
| 59 | addcc %i1,%l2,%i1 ! add mid products | |
| 60 | mov 0,%l0 ! we need the carry from that add... | |
| 61 | movcs %xcc,%o2,%l0 ! ...compute it and... | |
| 2e65ca2b | 62 | sllx %i1,32,%i0 ! align low bits of mid product |
| 6b628d36 | 63 | add %i5,%l0,%i5 ! ...add to bit 32 of the hi product |
| 6b628d36 RM |
64 | srl %i4,0,%g5 ! zero high 32 bits of lo product |
| 65 | add %i0,%g5,%i0 ! combine into low 64 bits of result | |
| 66 | srlx %i1,32,%i1 ! extract high bits of mid product... | |
| 2e65ca2b | 67 | addcc %i0,%o0,%i0 ! add cy_limb to low 64 bits of result |
| 6b628d36 | 68 | add %i5,%i1,%i1 ! ...and add them to the high result |
| 6b628d36 RM |
69 | mov 0,%g5 |
| 70 | movcs %xcc,1,%g5 | |
| 6b628d36 | 71 | subcc %l1,%i0,%i0 |
| 2e65ca2b UD |
72 | stx %i0,[%o4+%o7] |
| 73 | add %g5,1,%l1 | |
| 74 | movcs %xcc,%l1,%g5 | |
| 75 | addcc %o7,8,%o7 | |
| 76 | bne,pt %xcc,1b | |
| 5ae3e846 | 77 | add %i1,%g5,%o0 ! compute new cy_limb |
| 6b628d36 | 78 | |
| 2e65ca2b UD |
79 | jmpl %i7+8, %g0 |
| 80 | restore %o0,%g0,%o0 | |
| 5ae3e846 UD |
81 | |
| 82 | END(__mpn_submul_1) |